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Alderfer/Three Sisters Park Trails & Conditions

Alderfer/Three Sisters Park is a mountain bike trail network in the Boulder, Golden & Nederland area, with 18 featured trails tracked here for daily conditions, the 7-day outlook, and the best time to ride.

18 featured trails elevation 5,161–8,179 ft in Boulder, Golden & Nederland

Is Alderfer/Three Sisters Park rideable right now?

Right now about 0 of 18 Alderfer/Three Sisters Park trails are riding well. Conditions change daily with rain, so the list below shows the live read for each trail, and the chart shows which day ahead is your best bet.

Alderfer/Three Sisters Park conditions at a glancesnapshot · Aug 14

Live conditions map
© OpenStreetMap
Open the live map
Riding right now
1 of 18 trails riding well
Dry 1Soft — ride gently 15Muddy — stay off 2
Air quality
AQI 80 · Moderate
EPA AirNow (observed) + CAMS forecast. Informational.
Next 9 days
Trails riding well each day · blue dot = rain
0Today0Sat0Sun0Mon0Tue0Wed2Thu2Fri2Sat
Most trails are wet right now and stay marginal through the week. Look for a rocky or sandy trail that drains fast.
Temperature this week
Lower trails5,174–7,733 ft
43°typical 53°–78°F91°
High country7,848–10,404 ft
34°typical 46°–71°F82°
30°50°70°90°
Trail soil & drainage
Decomposed granite 83%Loam 17%
Mostly decomposed granite, which drains fast and firms up quickly after rain.
See the live map & forecastEvery trail's live read · best time to ride · 10-day outlook
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Alderfer/Three Sisters Park FAQ

When will Alderfer/Three Sisters Park dry out?

It depends on recent rain and the soil. The 10-day outlook on this page shows how many Alderfer/Three Sisters Park trails are expected to be riding well each day, with rain markers, so you can pick the right day. See the 10-day outlook →

How many mountain bike trails are in Alderfer/Three Sisters Park?

Alderfer/Three Sisters Park has 18 featured mountain bike trails tracked here for conditions. It's part of the Boulder, Golden & Nederland riding area in Colorado.

Where is Alderfer/Three Sisters Park?

Alderfer/Three Sisters Park is a mountain bike trail network in the Boulder, Golden & Nederland area of Colorado, running from about 5,161–8,179 ft. Open the live map for trailheads, GPX, and today's conditions on each trail. Open the live map →

Is Alderfer/Three Sisters Park too muddy to ride after rain?

Alderfer/Three Sisters Park is mostly decomposed granite soil, which drains fast and firms up quickly after rain. After a storm some trails firm up within a day while others stay greasy, so the live read above shows which are rideable before you drive out. Check the live conditions →

What is the best day this week to ride Alderfer/Three Sisters Park?

Based on the 10-day outlook, Thursday looks best, with about 2 of 18 Alderfer/Three Sisters Park trails expected to ride well. The outlook chart above shows the full 10 days so you can time your ride.

More Boulder, Golden & Nederland trail networks

All Boulder, Golden & Nederland trails → · Colorado conditions →